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18 Cards in this Set

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  • Back
Autonomic Nervous System
Portion of the nervous system that controls the actions of the Viscera and the Skin
Axon
Nerve fiber that conducts impulses away from the neuron cell body
Action Potential
Sequence of electrical changes in a nerve cell membrane exposed to a stimulus that exceeds it's threshold
Dendrite
Nerve fiber that transmits impulses toward the nerve cell body
Central Nervous Sustem
Portion of the nervous system that consists of the brain and spinal cord.
Covergnece
Nerve impulses arriving at the same neuron
Divergence
A neuron sending impulses to multiple other neurons
Effector
muscle or gland that responds to stimulation
Facilitation
subthreshold stimulation of a neuron make it more responsibe to further stimulation
Ganglion
Mass of neuron cell bodies, usually outside the central nervous system
Meninges
(3) members that cover the brain and spinal cord
Myelin
fatty material that forms sheathlike coverng around some nerve fibers
Neurilemma
sheath formed from schwann cells on outside of some nerve fibers
Neurotransmitter
somatic nervous system
Parasympathetic Nervous System
Portion of autonomic nervous system that arises from brain and sacral region of spinal cord.
Peripheral Nervous system
Portions of nervous system outside central nervous system
Reflex Arc
Nerve pathway, osnsisting of a snsory neuron, internueron, and motor neuron, that forms the structural and functional losses for a reflex
Sensory Neuron
Neuron that transmits and impulse from a receptor to te central nervous system